Home / 128,020.50-176,668.29-71,432.28

Finding the Fourth Proportional to 128,020.50, 176,668.29 and 71,432.28

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Solution

The fourth proportional to 128,020.50, 176,668.29 and 71,432.28 is: 98,576.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,020.50 : 176,668.29 = 71,432.28 : x
  2. Step 2: Convert to fraction form
    128,020.50/176,668.29 = 71,432.28/x
  3. Step 3: Cross multiply
    128,020.50x = 176,668.29 × 71,432.28
  4. Step 4: Simplify right side
    128,020.50x = 12,619,818,758.40
  5. Step 5: Solve for x
    x = 12,619,818,758.40/128,020.50
  6. Step 6: Final answer
    x = 98,576.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.